Since its establishment in 1964, Ohtama Co., Ltd. has been recognized in the industry as a maker specialized in magnetic shielding with Permalloy

The
history of Permalloy shield cases is full of changes. It was about
forty and some years ago when sheet Permalloy (iron-nickel soft
magnetic material: JIS C 2531) was produced for the first time
in Japan. At that time, it was used for magnetic shield cases for
CRTs of oscilloscopes and radars. Subsequently, it has come to
be widely used for telecommunication equipment, broadcasting equipment,
computers and nuclear power generation. Today, it is used also
for the manufacture of shield rooms for electron beam exposure
devices. electron microscopes, or magnetic resonance image diagnosis
systems (MRI).
What is important to ensure -excellent magnetic shield characteristics
are the heat treatment technique (hydrogen annealing) and the combination
of heat treatment and sheet processing (including sheet machining)
that exert great influence upon magnetic characteristics. The magnetic
shield characteristics of our products are fully controlled by virtue
of the heat treatment with our own-make hydrogen-annealing furnace.
To satisfy customer needs, we will utilize the "Quality Management
System, ISO 001: 2000" and endeavor at all times to make improvements
in it, and will strive to develop our business further while contributing
to the development of society. We hope that we will be favored with
your continued support in the future as well.
Our affiliated company TUV Ohtama Ltd. is a joint corporation with " TUV
Japan," a Japanese corporation of the third party testing and
certification body "TUV SUD Group" (TUV Suddeutschland
Holding AG) of Germany. This TUV Ohtama is a top-rank company in
the field of the FCC, VCCI and CE markings concerned with electromagnetic
wave regulations. The company also is working its way to the realization
of higher customer satisfaction.